Stable coated microcapsules

Details Stable coated microcapsules Stable coated microcapsules

B - Operations, Transporting

01

J

B01J 13/02 (2006.01) A23L 1/00 (2006.01) A23L 1/0532 (2006.01) A23L 1/30 (2006.01) A23P 1/04 (2006.01) A61K 9/50 (2006.01) B01J 13/22 (2006.01) A61K 9/16 (2006.01) A61K 9/20 (2006.01)

Patent

CA 2485193

The present invention provides a process for the preparation of a microencapsulated composition containing lipophilic compounds comprising of the following steps:(i) Particle size reduction of the lipophilic compound in the presence of a surface active agent;(ii) Preparing a solution of alkali metal alginate.(iii) Combining the solutions of step (i) and step (ii).(iv) Adding dropwise the solution obtained from stage (iii) to a solution containing Ca2+, obtaining beadlets, and removing the formed beadlets from said solution;(v) Rinsing the beadlets with an acidic solution and drying;(vi) Coating the beadlets obtained from step (v) to obtain the microcapsules.The present invention, in one aspect, relates to a microencapsulated composition comprising of one or more lipophilic compound enveloped by a surfactant which is encapsulated in an alginate matrix and further coated with an outer coating, wherein the particle size of the lipophilic substance is not greater than 20 m.

L'invention porte sur un procédé de préparation d'une composition microencapsulée contenant des composés lipophiles. Ce procédé consiste : (i) à réduire la taille des particules des composés lipophiles en présence d'un agent tensio-actif ; (ii) à préparer une solution d'alginate de métaux alcalins ; (iii) à combiner les solutions obtenues au cours de l'étape (i) et (ii) ; (iv) à ajouter goutte à goutte la solution obtenue au cours de l'étape (iii) dans une solution contenant du Ca2+, à obtenir des granules, et à ôter ces granules de ladite solution ; (v) à rincer les granules avec une solution acide et à les sécher ; (vi) à enrober les granules formées au cours de l'étape (v) afin d'obtenir les microcapsules. Selon un aspect, l'invention se rapporte à une composition microencapsulée contenant au moins un composé lipophile enveloppé d'un agent tensio-actif qui est encapsulé dans une matrice d'alginate, puis enrobé d'un agent d'enrobage externe, la taille des particules de la substance lipophile ne dépassant pas 20 µm.

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